x11/kdisplay: add new port
KDisplay is a small display management app. It provides a simple and
straightforward UI for managing an arbitrary number of displays.
Features:
- Displays can be repositioned with drag-and-drop.
- An optimal resolution and refresh rate are automatically selected. Manual override is possible.
- Displays can be seemlessly "replicated".
- The settings of a display is by default remembered globally but can be overridden for specific combinations of displays.
- Provides additional integration for the KDE Plasma Workspace through a plasmoid and an OSD activated by hardware key for quick configuration changes.